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Business - Additional Information (Detail) $ in Thousands	Mar. 31, 2024 USD ($) Subsidiary Center Location	Dec. 31, 2023 USD ($)
Schedule Of Description Of Company [Line Items]
Number of inactive subsidiaries | Subsidiary	1
Bank operated banking centers | Center	62
Bank operated trust office locations, number | Location	3
Total assets	$ 16,468,146	$ 16,020,993
Bank owned life insurance (BOLI)	310,744	308,706
Goodwill	$ 765,822	$ 765,822

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